Frequencies for first 10,000 rows of rx4v1c1 variable in nhamcsopd2007 dataset :

   for rx4, |
 level 1 of |
multum drug |
category #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,513       75.13       75.13
        001 |        125        1.25       76.38
        020 |         23        0.23       76.61
        028 |          3        0.03       76.64
        040 |        458        4.58       81.22
        057 |        539        5.39       86.61
        081 |         42        0.42       87.03
        087 |        162        1.62       88.65
        097 |        109        1.09       89.74
        105 |         49        0.49       90.23
        115 |        191        1.91       92.14
        122 |        137        1.37       93.51
        133 |         91        0.91       94.42
        153 |          1        0.01       94.43
        218 |         26        0.26       94.69
        242 |        151        1.51       96.20
        254 |        101        1.01       97.21
        331 |          1        0.01       97.22
        358 |        276        2.76       99.98
        365 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016